package sample;

import java.awt.Desktop;
import java.awt.EventQueue;
import java.io.File;
import java.io.IOException;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;

import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.Pane;
import javafx.scene.layout.VBox;
import javafx.stage.FileChooser;
import javafx.stage.Stage;


public final class FileChooserSample extends Application {

    private final Desktop desktop = Desktop.getDesktop();

    @Override
    public void start(final Stage stage) {
        stage.setTitle("File Chooser Sample");

        final FileChooser fileChooser = new FileChooser();

        final Button openButton = new Button("Open a Picture...");
        final Button openMultipleButton = new Button("Open Pictures...");

        openButton.setOnAction(
                (final ActionEvent e) -> {
                    File file = fileChooser.showOpenDialog(stage);
                    if (file != null) {
                        openFile(file);
                    }
                });
        openMultipleButton.setOnAction(
                (final ActionEvent e) -> {
                    List<File> list =
                            fileChooser.showOpenMultipleDialog(stage);
                    if (list != null) {
                        list.stream().forEach((file) -> {
                            openFile(file);
                        });
                    }
                });
        final GridPane inputGridPane = new GridPane();
        GridPane.setConstraints(openButton, 0, 0);
        GridPane.setConstraints(openMultipleButton, 1, 0);
        inputGridPane.setHgap(6);
        inputGridPane.setVgap(6);
        inputGridPane.getChildren().addAll(openButton, openMultipleButton);
        final Pane rootGroup = new VBox(12);
        rootGroup.getChildren().addAll(inputGridPane);
        rootGroup.setPadding(new Insets(12, 12, 12, 12));
        stage.setScene(new Scene(rootGroup));
        stage.show();
    }
    public static void main(String[] args) {
        Application.launch(args);
    }
    private void openFile(File file) {
        EventQueue.invokeLater(() -> {
            try {
                desktop.open(file);
            } catch (IOException ex) {
                Logger.getLogger(FileChooserSample.
                        class.getName()).
                        log(Level.SEVERE, null, ex);
            }
        });
    }
}